川西低渗气藏气体钻井提速潜力评价  

EVALUATION OF GAS DRILLING POTENTIAL ROP IN CHUANXI LOW PERMEABILITY GAS RESERVOIRS

作　　者：龙刚[1,2] 朱化蜀[2] 王希勇[2] 李皋[2] 练章华[3] 杨谋[3] 

机构地区：[1]中国石油大学.华东 [2]中石化西南油气分公司工程技术研究院 [3]油气藏地质及开发工程国家重点实验室.西南石油大学

出　　处：《钻采工艺》2011年第4期25-27,2-3,共3页Drilling & Production Technology

基　　金：国家科技重大专项课题“低渗气藏特殊复杂地层高效钻井关键技术”(编号:2008ZX05022-005)部分研究成果

摘　　要：根据川西须家河组地层井底岩石应力状态分析,井底岩石侧向应力与钻井液条件下的差别为35%,是影响气体钻井提高钻速的主要因素。结合须家河组工程地质特征,开展须家河组地层坍塌密度、气体钻井强度和气体钻井井眼扩大率进行井壁稳定性评价,通过川西须家河组气体钻井井底岩石可钻性级值模型量化,进行了该地区气体钻井提速潜力评价。Through analysing the stress state of bottom hole rock in Chuanxi Xujiahe formation,the lateral stress of bottom hole rock was increased by 35% compared with under the drilling fluid condition.This was the main influential factors of gas drilling to improve drilling rate.Based on the engineering geological characteristics in Xujiahe formation,and analyzing formation collapse density,gas drilling strength and hole expansion rate,the wellbore stability was evaluated.And the potentiality of improving drilling rate in gas drilling was evaluated by using the rock drillability grade model.

关 键 词：川西 气体钻井 可钻性级值 钻井提速 

分 类 号：TE242.6[石油与天然气工程—油气井工程]